Gorman-Rupp Pumps PA4B60-4045H 1417817 thru 1497875 - Manual (Page 37)

OM−06228 PA SERIES
MAINTENANCE & REPAIR PAGE E − 15
Seal Removal and Disassembly
(Figure 4)
Carefully remove the spring holder (47) and seal
spring. Slide the shaft sleeve (45) and rotating por-
tion of the seal assembly off the shaft as a unit.
Apply oil to the sleeve and work it up under the bel-
lows. Slide the rotating portion of the seal off the
sleeve.
Remove the shaft sleeve O-ring (46) from the shaft.
Use a pair of stiff wires with hooked ends to remove
the stationary seat and O-ring from the pump cas-
ing bore.
NOTE
An alternate method of removing the stationary por-
tion of the seal is to remove the pump casing as de-
scribed below and then press the seal components
out of the pump casing from the back side.
If no further disassembly is required, refer to Seal
Reassembly And Installation.
Pump Casing Removal
(Figure 4)
Support the pump casing using a suitable hoist
and sling and remove the hardware securing the
casing to the base.
Remove the hardware (30 and 31) securing the
casing to the intermediate (12). Separate the parts
by pulling the casing straight away from the inter-
mediate. Remove any leveling shims from under
the casing feet. Tie and tag the shims for ease of
reassembly. Remove the casing gasket (5).
Inspect the balance ring (35) for excessive wear or
scoring. If replacement is required, use a small bit
to drill two holes horizontally, 180
_ apart, through
the wear ring. Use a chisel or other suitable tool to
complete the cuts through the wear ring. Use cau-
tion not to damage the pump casing.
Separating Intermediate and Drive Assembly
From Engine
(Figure 5)
To service the bearing (25) or drive components,
the intermediate must be separated from the en-
gine.
Support the intermediate using a suitable hoist and
sling and remove the hardware (6 and 7) securing
the intermediate to the engine bellhousing. Sepa-
rate the assemblies by pulling the intermediate
straight away from the engine.
As the assemblies separate, the flexible portion of
the coupling assembly (3) will remain on the shaft.
To remove the coupling from the shaft, unscrew the
two allen head setscrews from the bushing (2).
Screw one of the setscrews into the puller hole on
the circumference of the bushing. As the coupling
and bushing separate, remove the bushing and
slide the coupling off the shaft. Remove the shaft
key (14, figure 4).
It is not necessary to remove the outer ring of the
coupling from the engine flywheel unless the cou-
pling must be replaced. To remove the ring, disen-
gage the hardware (4 and 5) securing it to the fly-
wheel.
Inspect the pilot bushing (16, Figure 4) for exces-
sive wear or scoring. If replacement is required, it
can be easily removed from the engine flywheel by
making a hydraulic ram from a piece of steel bar
stock. Turn the ram to a diameter of 0.983 inch (25
mm).
When performing the following procedure,
grease can be ejected with great force.
Wear safety glasses or goggles to prevent
injury.
Completely pack the bore of the pilot bushing with
grease. Insert the end of the ram into the I.D. of the
bushing. Strike the ram sharply with a hammer,
compressing the grease, and forcing the bushing
out of the flywheel. Use additional grease as re-
quired, and continue to strike the ram until the
bushing is completely free.